Simple repport of strong throttling on 2016 MBP

[dboris]

The line at 1ghz represents a render on FCPX.
After rendering the CPU gets cooler therefore it gets back to 2ghz.
Base clock should be 2.3.

I'm living in Paris, 30°C.
The Laptop is my room, not exposed to the sun.

For a 2.5K machine, this is not acceptable.

I pray that Apple with address this problem in the next generation....
Cheap 1K gaming PC doesn't thermal throttle like this.
I hope this screen capture will help custommers like me in the same position to understand what's happenning.

 

[caramelpolice]

The temperature doesn't even seem to be getting that high, nor is utilization, so I'd be surprised if it's thermally throttling. Not sure what's going on here.

 

[dboris]

I think the temp showed is wrong.
It behaves exactly the same in windows.
If I do a benchmark without anything launched I get "normal" specs.
If I launch PUBG in the background + launch geekbench, then I get to 1ghz after 10mn,
then I get something like 1ghz, 1200pts single core, 4500pts multicore (1/3 of what would be expected).
I noticed that OSX was getting way slower than before when doing a lot in the same time.
In windows now I can't play any game without the CPU going to 1Ghz.

It's very hot despite showing 60°.

 

[Schranke]

is it really hot to the touch when you are running FCPX, PUPG and Geekbench?
As I can see on your picture you have multiple temperature readouts in the menu bar, and they are all low, especially for a system which should have just throttled. so I also have a some doubts about it throttling, and I have a hard time believing that multiple sensors will be failing.
Do you run a program to set fan speed?
What are your Geekbench score on MacOS (+ the average of 5 consecutive runs?)
And what is your battery status?

 

[dboris]

Yes for all.
I tried just today to put fanspeeds to max to see if it fix the throttle.
But I wasn't using it on this test ; auto speed.

Battery ; 56 cycles
https://www.noelshack.com/2018-27-6-1530991134-capture-d-ecran-2018-07-07-a-21-18-10.jpg

All the test are with DC plugged in.
I don't get to 1ghz but would you be interested into the same experiment with games/other benchmark like unigine or such?
I tried to run 5x geekbench (the problem I think is that geekbench only require the CPU and not both like Davinci Resolve / Gaming / FCPX.

The test have been running with only chrome + youtube + photoshop (as I was waiting ) :
https://www.noelshack.com/2018-27-6-1530992445-geekbench.jpg


I noticed a LOT the slow downs in games as it translate to FPS drops while I had no problems since 1 year.
On osx, only bugs me when using FCPX and Resolve but it's harder to detect since it "seems" ok to have a laggy computer when rendering...
[doublepost=1530993057][/doublepost]Yes it is but I haven't noticed any throttling when using only geekbench.
I think it's because it uses only the CPU, right?

I will later try with unigine as I have really noticed the throttling in games : FPS drops everywhere while it was running fine before :/.

For FCPX/Resolve it's harder to detect as you never know if the laptop is laggy because of heat / or just normal behaviour because of rendering.

On the above screenshots of FCPX, I lauched intel gadget because it was soooo much laggy for a simple FCPX render... I got suspicious.

 

[Queen6]

Very much a "canned" response from the days when the 15" MBP ran extremely hot, equally some points remain to be of use:

Being an owner & user of the 15" MacBook Pro since forever; Over the years the 15" has frequently struggled with it`s thermals, especially when an external display is connected as the dGPU engages by default, internal temperatures soar, equally there are some steps that can be taken to reduce the systems temperature;

• Elevate the rear 2cm - 3cm, aluminium passive coolers generally work best (I use RainDesign`s mStand & iLap), even small portable risers such as ORICO's Creative Laptop Stand can make a difference, very handy for those on the "go".
• Increase base fan RPM to 3K or as much as you are comfortable with (MacsFanControl or SMC Fan Control)
• Limit the dGPU`s usage with gfxCardStatus
• Swap out Chrome for Chrome Canary as it can be more optimised for OS X and may extend battery run time, reduce thermals etc.
• Swap out VLC for Movist as again it`s a reduced load on CPU/GPU
• Uninstall or block Flash
• Install an ad blocker Wipr or AdGuard works well
• Powered coolers are very much a "mixed bag" when it comes to Mac portables, you need one that has a high capacity (100 CFM minimum) and preferably a large single fan, this can help to keep the 15" internal fans below 4K which for many is good enough as often it`s this point and beyond where the fans become intrusive and annoying. Don't expect a powered cooler impact internal temperatures, beyond a couple of degrees
• Older notebooks can benefit from cleaning of the cooling system
• Retina`s can benefit from cleaning of the cooling system, as the heat syncs are far smaller and loose efficiency faster, due to build up of dust/debris etc.
• Replacing the thermal paste has been hit & miss, some with very positive results, some with no improvement over stock. Personally I would only do this on a Mac that was either very old, or one that I can confirm was definitely running a lot hotter than stock.
• If your MBP has a discrete GPU, it will fire up when an external display is connected as default, temperatures will rise rapidly.
• Consider a specific vertical stand when using a MPB in "Clamshell" mode allowing for greater circulation of air. Some recommend inverting the MBP in the stand with the exhaust at the top & intake at the bottom (Retina)
• Another option for static setups is a USB powered fan strategically placed so it blows across the MBP keyboard deck (air flow L-R above & below the keyboard)

​

The key to a quiet life with a 15" MacBook Pro is several incremental changes that can and do add up to reduce thermals. From my experience over the years if your going to push a 15" MBP hard the fans are going to max out fast, with associated temperature & noise. If your using it with a moderate load, life can be made quieter. For the most part your MBP runs hot as that`s how Apple designed it, this is the trade off for being thin & light...

Like it or loath it, there's good reason why the majority of Windows MBP counterparts have significantly more cooling & vents, nor is it due to their design teams being inept. Apple simply places form over function first in many circumstance. My own primary notebook can hold maximum Turbo of 3.9GHz, equally it's larger & heavier with a far more robust cooling solution.

The old adage still applies; it`s easier to keep a system cool, than cool-down an already overly hot machine. This being said it`s not strictly necessary unless as in this case performance is being compromised, equally it`s nice to know that there are some options for reducing temperature out there, and a quieter life.

As for throttling some answers to that question may lie here, although don't expect too much for the 2016/2017:

https://forums.macrumors.com/threads/automated-tool-to-reveal-throttling-and-overheating-github.1731178/


Q-6
​

 

[dboris]

Hello, thanks for your input !

I don't want to invest into cooling tricks. I should not have to be bothered by such problems.

I was putting it up so people can think about this and check if they are affected too.

Well, I can confirm that when gaming I get down to 1-1.8ghz maximum.
It was previously able to sustain (at least 2.4Ghz, right?)

I guess I'm not alone to have crippled specs right?
Basically even a dual core could get better performance on demanding tasks if not throttled.

I will buy a desktop soon as I can't keep using this system for demanding tasks.

 

[ondert]

Did you check Activity Monitor? Similar things happened to me twice on both 2013 and 2016 MacBook Pros. At first case, the cpu temps were getting up to 90 degree Celsius on normal usage. The reason was Steelseries' software. On the second case, my current 2016 Touch Bar MacBook Pro were throttling hard even the cpu temps were about 55-60 degree Celsius. The reason was Macs Fan Control software. On both cases, it was a software issue. Macs do get hot but doesn't throttle as I experience until now. (except 12" macbook)

 

[Queen6]

Hello, thanks for your input !

I don't want to invest into cooling tricks. I should not have to be bothered by such problems.

I was putting it up so people can think about this and check if they are affected too.

Well, I can confirm that when gaming I get down to 1-1.8ghz maximum.
It was previously able to sustain (at least 2.4Ghz, right?)

I guess I'm not alone to have crippled specs right?
Basically even a dual core could get better performance on demanding tasks if not throttled.

I will buy a desktop soon as I can't keep using this system for demanding tasks.

If your into gaming or demanding workloads, your on the wrong platform...

Personally I game infrequently, equally this notebook meets all my professional needs (multiple engineering disciplines) without drama and then some. Being overly Thin & Light has it trade off's...

Intel hex core i7 8750H, GTX 1070, 32Gb @ 2666Hz, NVMe SDD + SSHD, no throttling, no tricks, no problems...

Q-6

 

[leman]

As mentioned by a previous poster, the graphs you have posted do not show throttling. CPU utilization and power draw are way too low to indicate any serious CPU stress. To me, it looks like the CPU is put into a lower power state for some reason while being only lightly used. What are the GPU stats during this? Maybe your workflow is GPU heavy and does not pose any stress for the CPU? Or maybe your power management system is messed up? Try resetting the SMC. At any rate, this is anything but throttling. With throttling you’d see CPU temp at 100, very high CPU utilization and power draws of 40W or more ( assuming it’s the 15” machine). Not to mention that with throttling one sees an initial period of high performance where the temps are rising and then the temperature stays stable and the performance drops. Your picture is nothing like that.

 

[Queen6]

As mentioned by a previous poster, the graphs you have posted do not show throttling. CPU utilization and power draw are way too low to indicate any serious CPU stress. To me, it looks like the CPU is put into a lower power state for some reason while being only lightly used. What are the GPU stats during this? Maybe your workflow is GPU heavy and does not pose any stress for the CPU? Or maybe your power management system is messed up? Try resetting the SMC. At any rate, this is anything but throttling. With throttling you’d see CPU temp at 100, very high CPU utilization and power draws of 40W or more ( assuming it’s the 15” machine). Not to mention that with throttling one sees an initial period of high performance where the temps are rising and then the temperature stays stable and the performance drops. Your picture is nothing like that.

On battery? 15" 2016/2017 MBP should easily pull a clean 45W (CPU), with the thermals generally being decent. That said the notebook is throttling for reasons unknown. Potentially related to power as the temperature does not appear to be consistently high.

Q-6

 

[leman]

That said the notebook is throttling for reasons unknown. Potentially related to power as the temperature does not appear to be consistently high.

It’s a question of terminology these days, when one says throttling one usually means thermal throttling and that certainly doesn’t happen here. In general, frequency drops are expected and desirable if the CPU is not being used actively. Frankly, I have no idea what is going on. Maybe power management is messed up, maybe the machine is defective, or maybe the software is idling the CPU on purpose.

 

[Queen6]

It’s a question of terminology these days, when one says throttling one usually means thermal throttling and that certainly doesn’t happen here. In general, frequency drops are expected and desirable if the CPU is not being used actively. Frankly, I have no idea what is going on. Maybe power management is messed up, maybe the machine is defective, or maybe the software is idling the CPU on purpose.

Technically throttling is the CPU/GPU not being capable of maintaining the advertised base frequency, although one would obviously prefer the CPU/GPU to have sufficient cooling/power to maintain max Turbo indefinitely.

Throttling can be related to both cooling and powertrain as the CPU will clock down if either are not optimal, equally the new 8th Gen 8750H CPU can ramp up to as much as 90W (PL-2) then roll back to 45W/52W (PL-1) which is to be expected and within design parameters. 8950HK well and truly past 100W, especially if OC.

This case looks to be more akin to power throttling, although the driving factor is far from clear, equally the cooling of modern notebooks is complex, with the CPU frequency potentially being reduced due to a BD PROCHOT flag, meaning another component dGPU, VRM, Chokes etc. is running hot requiring the CPU to roll back frequency. I'm unsure if Apple utilise this protocol, equally booting into Windows one can look at such matters in more detail as there's more tools.

Q-6

 

[leman]

Technically throttling is the CPU/GPU not being capable of maintaining the advertised base frequency, although one would obviously prefer the CPU/GPU to have sufficient cooling/power to maintain max Turbo indefinitely.

I think you are missing an important component in your definition. CPUs regularly run below the base frequency, and it’s a good thing too, since it’s the key to their power efficiency. In this particular situation, the CPU might enter a lower power state simply because of the software usage patterns (waiting threads/lower priority threads), or a bug in the OS. Or it could be what you mention - a power issue. At any rate, we don’t know. OP didn’t provide enough information. The situation could be normal or abnormal.

 

[dboris]

Hello.
Well I obviously know that I would get better performance from a gaming laptop but that's not the point.
I also know it's normal for a CPU to run bellow the base clock when doing non-demanding tasks like browsing.

The problem is, when I using it to code + while having VM openned, it gets slower than before ; this is what I do as when I work and I noticed it was way slower than before.

When I render a file on FPCX it gets to 1ghz WHILE rendering. And then the clock gets higher while uploading.

When gaming after a few minutes the CPU gets from 2.7ghz to 1-1.8ghz. Therefore I loose half my FPS.

The point is; under load my CPU is throttled, and I have far less performance than before.
I don't think that other laptops gets to 1ghz while rendering video files. Do they?

I saw that the temps are no way around 90°.
And don't you think it's strange? That I never get to 90° and that the clock goes so low during benchs/renders/gaming?


throttling one sees an initial period of high performance where the temps are rising and then the temperature stays stable and the performance drops.

It does behaves like this when gaming !
I can relate as I FEEL the FPS drop. In other apps it's harder to see if not consistently monitoring the clocks.

Will get back to you !
I'm quite happy to see that I got some attention so I will run other benchmarks and share the result here. I'm certain there's something wrong here.
Let me know if you want me to do specific tasks.
I already resetted the SMC but will do it again.
[doublepost=1531063742][/doublepost]Edit:

UNIGINE HEAVEN screenshots (in order of benchmark)
The URL shows the time.
I started the benchmark when the MBP was silent.
So it took less than 5mn to go from full performance to 1ghz and laggy.
If this doesn't show thermal throttling...

Also the temps gets back to 60° at the end but the CPU speed wasn't recovering at all.

https://www.noelshack.com/2018-27-7-1531063572-capture-d-ecran-2018-07-08-a-17-20-56.jpg (start of the bench)
https://www.noelshack.com/2018-27-7-1531063574-capture-d-ecran-2018-07-08-a-17-21-43.jpg
https://www.noelshack.com/2018-27-7-1531063573-capture-d-ecran-2018-07-08-a-17-22-36.jpg
https://www.noelshack.com/2018-27-7-1531063573-capture-d-ecran-2018-07-08-a-17-23-18.jpg
https://www.noelshack.com/2018-27-7-1531063573-capture-d-ecran-2018-07-08-a-17-23-26.jpg
https://www.noelshack.com/2018-27-7-1531063572-capture-d-ecran-2018-07-08-a-17-23-48.jpg
https://www.noelshack.com/2018-27-7-1531063576-capture-d-ecran-2018-07-08-a-17-24-20.jpg
https://www.noelshack.com/2018-27-7-1531063578-capture-d-ecran-2018-07-08-a-17-24-49.jpg (end of the bench)
https://www.noelshack.com/2018-27-7-1531063576-capture-d-ecran-2018-07-08-a-17-25-26.jpg



Edit:

I reseted the SMC a third time.
Still no change. Still throttling after a few dozen of seconds.
This time after seeing that I saw at 1.2ghz I stopped : it got back to normal clock quite quickly.

https://www.noelshack.com/2018-27-7-1531066637-capture-d-ecran-2018-07-08-a-18-15-12.jpg

 

[Queen6]

I think you are missing an important component in your definition. CPUs regularly run below the base frequency, and it’s a good thing too, since it’s the key to their power efficiency. In this particular situation, the CPU might enter a lower power state simply because of the software usage patterns (waiting threads/lower priority threads), or a bug in the OS. Or it could be what you mention - a power issue. At any rate, we don’t know. OP didn’t provide enough information. The situation could be normal or abnormal.

No not at all, nor is an i7 quad core running at 1GHz under load normal. For once you might drop your obsessive defense of Apple and actually try to help another member of the community....

Q-6
[doublepost=1531085739][/doublepost]

Hello.
Well I obviously know that I would get better performance from a gaming laptop but that's not the point.
I also know it's normal for a CPU to run bellow the base clock when doing non-demanding tasks like browsing.

The problem is, when I using it to code + while having VM openned, it gets slower than before ; this is what I do as when I work and I noticed it was way slower than before.

When I render a file on FPCX it gets to 1ghz WHILE rendering. And then the clock gets higher while uploading.

When gaming after a few minutes the CPU gets from 2.7ghz to 1-1.8ghz. Therefore I loose half my FPS.

The point is; under load my CPU is throttled, and I have far less performance than before.
I don't think that other laptops gets to 1ghz while rendering video files. Do they?

I saw that the temps are no way around 90°.
And don't you think it's strange? That I never get to 90° and that the clock goes so low during benchs/renders/gaming?


throttling one sees an initial period of high performance where the temps are rising and then the temperature stays stable and the performance drops.

It does behaves like this when gaming !
I can relate as I FEEL the FPS drop. In other apps it's harder to see if not consistently monitoring the clocks.

Will get back to you !
I'm quite happy to see that I got some attention so I will run other benchmarks and share the result here. I'm certain there's something wrong here.
Let me know if you want me to do specific tasks.
I already resetted the SMC but will do it again.
[doublepost=1531063742][/doublepost]Edit:

UNIGINE HEAVEN screenshots (in order of benchmark)
The URL shows the time.
I started the benchmark when the MBP was silent.
So it took less than 5mn to go from full performance to 1ghz and laggy.
If this doesn't show thermal throttling...

Also the temps gets back to 60° at the end but the CPU speed wasn't recovering at all.

https://www.noelshack.com/2018-27-7-1531063572-capture-d-ecran-2018-07-08-a-17-20-56.jpg (start of the bench)
https://www.noelshack.com/2018-27-7-1531063574-capture-d-ecran-2018-07-08-a-17-21-43.jpg
https://www.noelshack.com/2018-27-7-1531063573-capture-d-ecran-2018-07-08-a-17-22-36.jpg
https://www.noelshack.com/2018-27-7-1531063573-capture-d-ecran-2018-07-08-a-17-23-18.jpg
https://www.noelshack.com/2018-27-7-1531063573-capture-d-ecran-2018-07-08-a-17-23-26.jpg
https://www.noelshack.com/2018-27-7-1531063572-capture-d-ecran-2018-07-08-a-17-23-48.jpg
https://www.noelshack.com/2018-27-7-1531063576-capture-d-ecran-2018-07-08-a-17-24-20.jpg
https://www.noelshack.com/2018-27-7-1531063578-capture-d-ecran-2018-07-08-a-17-24-49.jpg (end of the bench)
https://www.noelshack.com/2018-27-7-1531063576-capture-d-ecran-2018-07-08-a-17-25-26.jpg



Edit:

I reseted the SMC a third time.
Still no change. Still throttling after a few dozen of seconds.
This time after seeing that I saw at 1.2ghz I stopped : it got back to normal clock quite quickly.

https://www.noelshack.com/2018-27-7-1531066637-capture-d-ecran-2018-07-08-a-18-15-12.jpg

It's potentially something else in the system that's running hot which can result in the CPU throttling such as the VRM's however on vast majority of notebooks (as far as I'm aware) there is no way to physically monitor such components. All the indicators of thermal/power throttling are present, however the CPU temp and or power draw does not appear to be excessive or even close to the limits. From the last images (Unigine Heaven) I would say the GPU is likely running hot and Apple is utilising the BD PROCHOT flag to help cool the notebook. Cooling system is shared which is another factor.

When the MBP exhibits this throttling behaviour does it switch to charging the battery as this may indicate the power supply is inadequate/faulty. I believe that you need more information to really understand the issue, a more comprehensive system monitor application will reveal more as Intel's Power Gadget is confined to a few data points related to the CPU in isolation. In this situation you need more information on system temperature and power status.

I would also consider any recent updates to the system or major applications as you are describing a sudden unexpected change in the notebooks behaviour. Have you considered rolling back to a recent backup of the system? If you have it could be the easiest way to validate the notebooks software image.

From ThrottleStop
"BD PROCHOT stands for bi-directional prochot. PROCHOT stands for processor hot which is the signal that is activated within the CPU when it reaches approximately 100C to 105C depending on the model number. This signal is what initiates thermal throttling so the CPU can slow down and keep from over heating. Intel included a bi-directional feature so if something else like a GPU is running too hot, it would be able to send a PROCHOT signal directly to the CPU and force it to cool down so the entire laptop cools down."

Q-6

 

[dboris]

"When the MBP exhibits this throttling behaviour does it switch to charging the battery as this may indicate the power supply is inadequate/faulty."

I'll run unigine again and get back to you.

"In this situation you need more information on system temperature and power status."

Do you have any software to suggest?

"Have you considered rolling back to a recent backup of the system?"

No ! I just reinstalled bootcamp and I obtain the same exact behaviour.
So basically on both OSX & W10, I get the same results.
Therefore I think that it's hardware related for sure.

Thanks for the PROCHOT information. I really have to check the GPU temps and see if it's correlated. I was thinking about this too since the Macbook seems very hot while the GPU is only at 60-75°.

Also, my macbook is subject to the strange "noises", some "poc" noises that happens from time to time.
I already read some comments, it's quite common and -maybe- it could be related to heatsink bending / breaking over time
We'll see !

 

[Eason85]

Use HWiNFO on bootcamp and you'll be able to see why it's throttling. You need to check your power limits to determine the cause. It may be a VRM failure or heat issue. There is no way to tell without proper hardware monitoring of PL1, PL2, temps, and clockspeeds.

 

[Queen6]

Agree HWinfo64 for Windows will offer far more data points. Also ThrottleStop, however until the reason for the CPU rolling back frequency is clearer I advise not to apply any undervolt as this also impacts VRM performance.

With ThrottleStop we will be able to monitor many more aspects of the CPU, specifically what limits are being exceeded and if BD PROCHOT is flagging.

Q-6

 

[Eason85]

Can you undervolt on macs? One of the reasons i returned my 2017 mbp was that the VID was locked, so i was forced to waste power and generate heat unnecessarily. *******s.

 

[Queen6]

Can you undervolt on macs? One of the reasons i returned my 2017 mbp was that the VID was locked, so i was forced to waste power and generate heat unnecessarily. *******s.

Believe there is now a native OS X application, Windows you would need to see if Adaptive Voltage for CPU Core & Cache can be unlocked with ThrottleStop, Intel XTU is another alternative all thought it does not always apply the undervolt on restart for numerous reasons...

Q-6

 

[alexballvideos]

**EDIT** sorry, so much to read in this thread, didn't read it all clearly. So you have a 15" 2016 model. I see Parallels open in the Dock on some screenshots, was there a VM running? I would not expect to ever see 100% system Utilization using FCPX, HEAVEN Bench or Geekbench. I never have on three different machines at my end. So forget those results as any evidence of a problem. I'd run an encode with handbrake and see if there was clear throttling below the System rated frequency, then it's time to fresh install OSX on an external drive and see if it's any better. Then off to apple with evidence if its still not performing.
**EDIT**

Firstly, what MBP do you actually have? 13/15 CPU / GPU?

I think you are misunderstanding how mobile CPU's work. My 2017 15" MacBook Pro, my last 2013 13" MacBook Pro both behave the same in regards to the CPU running at very low clock speeds much of the time, it's called power saving. Leaving Intel power gadget open, my system is basically at 1.5GHz most of the time (2017 15" 2.9GHz 4GB 560Pro). They aggressively down clock when no or low CPU loads are present. Look at the CPU load on all of your screenshots (the bottom Utilization IA Graph) it is very low % CPU Utilisation. Hence the system does not bother upping the clock frequency.

Also, you are doing GPU intensive things and the GT 0.00GHz usually means the Discrete GPU is hauling ass at this time and the Integrated GPU/ and CPU often is doing **** all. In regards to FCPX. If exporting H264, the system will use Intel QuickSync to hardware encode the H264 work and often rely heavily on the GPU for other tasks (OpenCL / Metal). When I export with FCPX my computer hardly ever gets under much CPU load, never heard the fans ever, because it's using the integrated or discrete GPU to get the job done along with intel QuickSync. System utilisation is often around 30% for me while exporting. If I save out a ProRes 422 Master it will be higher at 50%+.

A sure fire way I've found to check if the system is throttling the CPU is to encode a video with handbrake. Game benchmarks and Geekbench are highly variable in the CPU usage, Geekbench hardly does anything to my clock frequencys for much of the benchmark, again look at the Utilization Graph.
Handbrake will max out the machine CPU's using ALL Cores and you will definitely see it drop down from turbo-boost clock to a stable frequency that it can sustain. See my screenshot 10min into encoding a 1080p video, it started at 3.5GHz and 100C and then stays at 3.3GHz 96C for the next 10min as in screenshot.

I think perhaps you have the non-touchbar 13" MBPro?
It only has one fan and "I have heard" the CPU down clocks quite a bit from a very high turb-boost ability which it can't sustain for long. Either way give a handbrake encode a go.

The second screenshot is of Heaven Bench the second it finished, as you can see the Utilization is only around 15% during the whole benchmark and the CPU clock jumps all over the place, going up when required, down when not required. Meanwhile the Radeon 560 GPU no doubt was working overtime and often heats up the CPU when its doing not much at all, as they are the same cooling system, we can't see this though.

I hope you work out if there is a problem or if it just misinterpreted graphs. A Handbrake encode is your friend!

 

[b0fh666]

I guess your DGPU is overheating, not the CPU itself... there are programs like istat-menus that can monitor those temperatures.

 

[dboris]

Hello, sorry for the late reply !

was there a VM running

Nope ! :/

15" 2016, 512 SSD, std CPU & Radeon 455.

alexballvideos, b0fh666, I take note of what you told me and will test it if I still get the same problems later on, because :

Today I will bring my MBR to an Apple store for Keyboard fixing and they also took note of the throttling and will try to fix it for free since it's under keyboard replacement program.

I wasn't willing to do extenssive testing since, remember, when running Unigine Heaven, my CPU clock was getting at 1.1Ghz, and I was suddenly dropping frames.
All the games I as previously able to play on were suddenly laggy.
So it's pretty clear that it's not "normal behaviour" to me...
Anyway. We'll see what Apple does .